2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <sys/endian.h>
37 #define G_RAID3_CLASS_NAME "RAID3"
39 #define G_RAID3_MAGIC "GEOM::RAID3"
42 * 0 - Initial version number.
43 * 1 - Added 'round-robin reading' algorithm.
44 * 2 - Added 'verify reading' algorithm.
45 * 3 - Added md_genid field to metadata.
46 * 4 - Added md_provsize field to metadata.
47 * 5 - Added 'no failure synchronization' flag.
49 #define G_RAID3_VERSION 5
51 #define G_RAID3_DISK_FLAG_DIRTY 0x0000000000000001ULL
52 #define G_RAID3_DISK_FLAG_SYNCHRONIZING 0x0000000000000002ULL
53 #define G_RAID3_DISK_FLAG_FORCE_SYNC 0x0000000000000004ULL
54 #define G_RAID3_DISK_FLAG_HARDCODED 0x0000000000000008ULL
55 #define G_RAID3_DISK_FLAG_BROKEN 0x0000000000000010ULL
56 #define G_RAID3_DISK_FLAG_MASK (G_RAID3_DISK_FLAG_DIRTY | \
57 G_RAID3_DISK_FLAG_SYNCHRONIZING | \
58 G_RAID3_DISK_FLAG_FORCE_SYNC)
60 #define G_RAID3_DEVICE_FLAG_NOAUTOSYNC 0x0000000000000001ULL
61 #define G_RAID3_DEVICE_FLAG_ROUND_ROBIN 0x0000000000000002ULL
62 #define G_RAID3_DEVICE_FLAG_VERIFY 0x0000000000000004ULL
63 #define G_RAID3_DEVICE_FLAG_NOFAILSYNC 0x0000000000000008ULL
64 #define G_RAID3_DEVICE_FLAG_MASK (G_RAID3_DEVICE_FLAG_NOAUTOSYNC | \
65 G_RAID3_DEVICE_FLAG_ROUND_ROBIN | \
66 G_RAID3_DEVICE_FLAG_VERIFY | \
67 G_RAID3_DEVICE_FLAG_NOFAILSYNC)
70 extern u_int g_raid3_debug;
72 #define G_RAID3_DEBUG(lvl, ...) do { \
73 if (g_raid3_debug >= (lvl)) { \
74 printf("GEOM_RAID3"); \
75 if (g_raid3_debug > 0) \
76 printf("[%u]", lvl); \
78 printf(__VA_ARGS__); \
82 #define G_RAID3_LOGREQ(lvl, bp, ...) do { \
83 if (g_raid3_debug >= (lvl)) { \
84 printf("GEOM_RAID3"); \
85 if (g_raid3_debug > 0) \
86 printf("[%u]", lvl); \
88 printf(__VA_ARGS__); \
95 #define G_RAID3_BIO_CFLAG_REGULAR 0x01
96 #define G_RAID3_BIO_CFLAG_SYNC 0x02
97 #define G_RAID3_BIO_CFLAG_PARITY 0x04
98 #define G_RAID3_BIO_CFLAG_NODISK 0x08
99 #define G_RAID3_BIO_CFLAG_REGSYNC 0x10
100 #define G_RAID3_BIO_CFLAG_MASK (G_RAID3_BIO_CFLAG_REGULAR | \
101 G_RAID3_BIO_CFLAG_SYNC | \
102 G_RAID3_BIO_CFLAG_PARITY | \
103 G_RAID3_BIO_CFLAG_NODISK | \
104 G_RAID3_BIO_CFLAG_REGSYNC)
106 #define G_RAID3_BIO_PFLAG_DEGRADED 0x01
107 #define G_RAID3_BIO_PFLAG_NOPARITY 0x02
108 #define G_RAID3_BIO_PFLAG_VERIFY 0x04
109 #define G_RAID3_BIO_PFLAG_MASK (G_RAID3_BIO_PFLAG_DEGRADED | \
110 G_RAID3_BIO_PFLAG_NOPARITY | \
111 G_RAID3_BIO_PFLAG_VERIFY)
114 * Informations needed for synchronization.
116 struct g_raid3_disk_sync {
117 struct g_consumer *ds_consumer; /* Consumer connected to our device. */
118 off_t ds_offset; /* Offset of next request to send. */
119 off_t ds_offset_done; /* Offset of already synchronized
121 off_t ds_resync; /* Resynchronize from this offset. */
122 u_int ds_syncid; /* Disk's synchronization ID. */
123 u_int ds_inflight; /* Number of in-flight sync requests. */
124 struct bio **ds_bios; /* BIOs for synchronization I/O. */
128 * Informations needed for synchronization.
130 struct g_raid3_device_sync {
131 struct g_geom *ds_geom; /* Synchronization geom. */
134 #define G_RAID3_DISK_STATE_NODISK 0
135 #define G_RAID3_DISK_STATE_NONE 1
136 #define G_RAID3_DISK_STATE_NEW 2
137 #define G_RAID3_DISK_STATE_ACTIVE 3
138 #define G_RAID3_DISK_STATE_STALE 4
139 #define G_RAID3_DISK_STATE_SYNCHRONIZING 5
140 #define G_RAID3_DISK_STATE_DISCONNECTED 6
141 #define G_RAID3_DISK_STATE_DESTROY 7
142 struct g_raid3_disk {
143 u_int d_no; /* Disk number. */
144 struct g_consumer *d_consumer; /* Consumer. */
145 struct g_raid3_softc *d_softc; /* Back-pointer to softc. */
146 int d_state; /* Disk state. */
147 uint64_t d_flags; /* Additional flags. */
148 u_int d_genid; /* Disk's generation ID. */
149 struct g_raid3_disk_sync d_sync; /* Sync information. */
150 LIST_ENTRY(g_raid3_disk) d_next;
152 #define d_name d_consumer->provider->name
154 #define G_RAID3_EVENT_DONTWAIT 0x1
155 #define G_RAID3_EVENT_WAIT 0x2
156 #define G_RAID3_EVENT_DEVICE 0x4
157 #define G_RAID3_EVENT_DONE 0x8
158 struct g_raid3_event {
159 struct g_raid3_disk *e_disk;
163 TAILQ_ENTRY(g_raid3_event) e_next;
166 #define G_RAID3_DEVICE_FLAG_DESTROY 0x0100000000000000ULL
167 #define G_RAID3_DEVICE_FLAG_WAIT 0x0200000000000000ULL
168 #define G_RAID3_DEVICE_FLAG_DESTROYING 0x0400000000000000ULL
170 #define G_RAID3_DEVICE_STATE_STARTING 0
171 #define G_RAID3_DEVICE_STATE_DEGRADED 1
172 #define G_RAID3_DEVICE_STATE_COMPLETE 2
174 /* Bump syncid on first write. */
175 #define G_RAID3_BUMP_SYNCID 0x1
176 /* Bump genid immediately. */
177 #define G_RAID3_BUMP_GENID 0x2
186 static __inline enum g_raid3_zones
187 g_raid3_zone(size_t nbytes) {
189 return (G_RAID3_NUM_ZONES);
190 else if (nbytes > 16384)
191 return (G_RAID3_ZONE_64K);
192 else if (nbytes > 4096)
193 return (G_RAID3_ZONE_16K);
195 return (G_RAID3_ZONE_4K);
198 struct g_raid3_softc {
199 u_int sc_state; /* Device state. */
200 uint64_t sc_mediasize; /* Device size. */
201 uint32_t sc_sectorsize; /* Sector size. */
202 uint64_t sc_flags; /* Additional flags. */
204 struct g_geom *sc_geom;
205 struct g_provider *sc_provider;
207 uint32_t sc_id; /* Device unique ID. */
210 struct bio_queue_head sc_queue;
211 struct mtx sc_queue_mtx;
212 struct proc *sc_worker;
213 struct bio_queue_head sc_regular_delayed; /* Delayed I/O requests due
216 struct bio_queue_head sc_inflight; /* In-flight regular write
218 struct bio_queue_head sc_sync_delayed; /* Delayed sync requests due
219 collision with regular
222 struct g_raid3_disk *sc_disks;
223 u_int sc_ndisks; /* Number of disks. */
224 u_int sc_round_robin;
225 struct g_raid3_disk *sc_syncdisk;
227 struct g_raid3_zone {
233 } sc_zones[G_RAID3_NUM_ZONES];
235 u_int sc_genid; /* Generation ID. */
236 u_int sc_syncid; /* Synchronization ID. */
238 struct g_raid3_device_sync sc_sync;
239 int sc_idle; /* DIRTY flags removed. */
240 time_t sc_last_write;
243 TAILQ_HEAD(, g_raid3_event) sc_events;
244 struct mtx sc_events_mtx;
246 struct callout sc_callout;
248 struct root_hold_token *sc_rootmount;
250 #define sc_name sc_geom->name
252 const char *g_raid3_get_diskname(struct g_raid3_disk *disk);
253 u_int g_raid3_ndisks(struct g_raid3_softc *sc, int state);
254 #define G_RAID3_DESTROY_SOFT 0
255 #define G_RAID3_DESTROY_DELAYED 1
256 #define G_RAID3_DESTROY_HARD 2
257 int g_raid3_destroy(struct g_raid3_softc *sc, int how);
258 int g_raid3_event_send(void *arg, int state, int flags);
259 struct g_raid3_metadata;
260 int g_raid3_add_disk(struct g_raid3_softc *sc, struct g_provider *pp,
261 struct g_raid3_metadata *md);
262 int g_raid3_read_metadata(struct g_consumer *cp, struct g_raid3_metadata *md);
263 void g_raid3_fill_metadata(struct g_raid3_disk *disk,
264 struct g_raid3_metadata *md);
265 int g_raid3_clear_metadata(struct g_raid3_disk *disk);
266 void g_raid3_update_metadata(struct g_raid3_disk *disk);
268 g_ctl_req_t g_raid3_config;
271 struct g_raid3_metadata {
272 char md_magic[16]; /* Magic value. */
273 uint32_t md_version; /* Version number. */
274 char md_name[16]; /* Device name. */
275 uint32_t md_id; /* Device unique ID. */
276 uint16_t md_no; /* Component number. */
277 uint16_t md_all; /* Number of disks in device. */
278 uint32_t md_genid; /* Generation ID. */
279 uint32_t md_syncid; /* Synchronization ID. */
280 uint64_t md_mediasize; /* Size of whole device. */
281 uint32_t md_sectorsize; /* Sector size. */
282 uint64_t md_sync_offset; /* Synchronized offset. */
283 uint64_t md_mflags; /* Additional device flags. */
284 uint64_t md_dflags; /* Additional disk flags. */
285 char md_provider[16]; /* Hardcoded provider. */
286 uint64_t md_provsize; /* Provider's size. */
287 u_char md_hash[16]; /* MD5 hash. */
290 raid3_metadata_encode(struct g_raid3_metadata *md, u_char *data)
294 bcopy(md->md_magic, data, 16);
295 le32enc(data + 16, md->md_version);
296 bcopy(md->md_name, data + 20, 16);
297 le32enc(data + 36, md->md_id);
298 le16enc(data + 40, md->md_no);
299 le16enc(data + 42, md->md_all);
300 le32enc(data + 44, md->md_genid);
301 le32enc(data + 48, md->md_syncid);
302 le64enc(data + 52, md->md_mediasize);
303 le32enc(data + 60, md->md_sectorsize);
304 le64enc(data + 64, md->md_sync_offset);
305 le64enc(data + 72, md->md_mflags);
306 le64enc(data + 80, md->md_dflags);
307 bcopy(md->md_provider, data + 88, 16);
308 le64enc(data + 104, md->md_provsize);
310 MD5Update(&ctx, data, 112);
311 MD5Final(md->md_hash, &ctx);
312 bcopy(md->md_hash, data + 112, 16);
315 raid3_metadata_decode_v0v1v2(const u_char *data, struct g_raid3_metadata *md)
319 bcopy(data + 20, md->md_name, 16);
320 md->md_id = le32dec(data + 36);
321 md->md_no = le16dec(data + 40);
322 md->md_all = le16dec(data + 42);
323 md->md_syncid = le32dec(data + 44);
324 md->md_mediasize = le64dec(data + 48);
325 md->md_sectorsize = le32dec(data + 56);
326 md->md_sync_offset = le64dec(data + 60);
327 md->md_mflags = le64dec(data + 68);
328 md->md_dflags = le64dec(data + 76);
329 bcopy(data + 84, md->md_provider, 16);
330 bcopy(data + 100, md->md_hash, 16);
332 MD5Update(&ctx, data, 100);
333 MD5Final(md->md_hash, &ctx);
334 if (bcmp(md->md_hash, data + 100, 16) != 0)
344 raid3_metadata_decode_v3(const u_char *data, struct g_raid3_metadata *md)
348 bcopy(data + 20, md->md_name, 16);
349 md->md_id = le32dec(data + 36);
350 md->md_no = le16dec(data + 40);
351 md->md_all = le16dec(data + 42);
352 md->md_genid = le32dec(data + 44);
353 md->md_syncid = le32dec(data + 48);
354 md->md_mediasize = le64dec(data + 52);
355 md->md_sectorsize = le32dec(data + 60);
356 md->md_sync_offset = le64dec(data + 64);
357 md->md_mflags = le64dec(data + 72);
358 md->md_dflags = le64dec(data + 80);
359 bcopy(data + 88, md->md_provider, 16);
360 bcopy(data + 104, md->md_hash, 16);
362 MD5Update(&ctx, data, 104);
363 MD5Final(md->md_hash, &ctx);
364 if (bcmp(md->md_hash, data + 104, 16) != 0)
373 raid3_metadata_decode_v4v5(const u_char *data, struct g_raid3_metadata *md)
377 bcopy(data + 20, md->md_name, 16);
378 md->md_id = le32dec(data + 36);
379 md->md_no = le16dec(data + 40);
380 md->md_all = le16dec(data + 42);
381 md->md_genid = le32dec(data + 44);
382 md->md_syncid = le32dec(data + 48);
383 md->md_mediasize = le64dec(data + 52);
384 md->md_sectorsize = le32dec(data + 60);
385 md->md_sync_offset = le64dec(data + 64);
386 md->md_mflags = le64dec(data + 72);
387 md->md_dflags = le64dec(data + 80);
388 bcopy(data + 88, md->md_provider, 16);
389 md->md_provsize = le64dec(data + 104);
390 bcopy(data + 112, md->md_hash, 16);
392 MD5Update(&ctx, data, 112);
393 MD5Final(md->md_hash, &ctx);
394 if (bcmp(md->md_hash, data + 112, 16) != 0)
399 raid3_metadata_decode(const u_char *data, struct g_raid3_metadata *md)
403 bcopy(data, md->md_magic, 16);
404 md->md_version = le32dec(data + 16);
405 switch (md->md_version) {
409 error = raid3_metadata_decode_v0v1v2(data, md);
412 error = raid3_metadata_decode_v3(data, md);
416 error = raid3_metadata_decode_v4v5(data, md);
426 raid3_metadata_dump(const struct g_raid3_metadata *md)
428 static const char hex[] = "0123456789abcdef";
429 char hash[16 * 2 + 1];
432 printf(" magic: %s\n", md->md_magic);
433 printf(" version: %u\n", (u_int)md->md_version);
434 printf(" name: %s\n", md->md_name);
435 printf(" id: %u\n", (u_int)md->md_id);
436 printf(" no: %u\n", (u_int)md->md_no);
437 printf(" all: %u\n", (u_int)md->md_all);
438 printf(" genid: %u\n", (u_int)md->md_genid);
439 printf(" syncid: %u\n", (u_int)md->md_syncid);
440 printf(" mediasize: %jd\n", (intmax_t)md->md_mediasize);
441 printf("sectorsize: %u\n", (u_int)md->md_sectorsize);
442 printf("syncoffset: %jd\n", (intmax_t)md->md_sync_offset);
444 if (md->md_mflags == 0)
447 if ((md->md_mflags & G_RAID3_DEVICE_FLAG_NOAUTOSYNC) != 0)
448 printf(" NOAUTOSYNC");
449 if ((md->md_mflags & G_RAID3_DEVICE_FLAG_ROUND_ROBIN) != 0)
450 printf(" ROUND-ROBIN");
451 if ((md->md_mflags & G_RAID3_DEVICE_FLAG_VERIFY) != 0)
453 if ((md->md_mflags & G_RAID3_DEVICE_FLAG_NOFAILSYNC) != 0)
454 printf(" NOFAILSYNC");
458 if (md->md_dflags == 0)
461 if ((md->md_dflags & G_RAID3_DISK_FLAG_DIRTY) != 0)
463 if ((md->md_dflags & G_RAID3_DISK_FLAG_SYNCHRONIZING) != 0)
464 printf(" SYNCHRONIZING");
465 if ((md->md_dflags & G_RAID3_DISK_FLAG_FORCE_SYNC) != 0)
466 printf(" FORCE_SYNC");
469 printf("hcprovider: %s\n", md->md_provider);
470 printf(" provsize: %ju\n", (uintmax_t)md->md_provsize);
471 bzero(hash, sizeof(hash));
472 for (i = 0; i < 16; i++) {
473 hash[i * 2] = hex[md->md_hash[i] >> 4];
474 hash[i * 2 + 1] = hex[md->md_hash[i] & 0x0f];
476 printf(" MD5 hash: %s\n", hash);
478 #endif /* !_G_RAID3_H_ */